Machine for pre-registering stereotype color mats



Aug. 25, 1959 F. A. MIER 2,900,735

MACHINE FOR PRE-REGISTERING STEREOTYPE COLOR MATS Filed Aug. 6, 1956 4 Sheets-Sheet l llfl Wg i @S Aug. 25, 1959 F. A. MIER 2,900,735

MACHINE FOR PRE-REGISTERING STEREOTYPE COLOR MATS Filed Aug. 6, 1956 4 Sheets-Sheet 2 f?" BY Allg. 25,l 1959 F A, MlE-R 2,900,735

MACHINE FOR PRE-REGISTERING STEREOTYPE COLOR MATS Filed Aug. '6, 1956 4 Sheets-Sheet 3 Aug. 25, 1959 l r-T. A. -MIER MACHINE FOR PRE-REGISTERING STEREOTYPE COLOR MATS Filed Aug. 6, 1956 4 sheets-shea 4 MAC FOR PRE-REGISTERING STEREOTYPE COLOR MATS Ferdinand A. Mier, Detroit, Mich., assignor to Knight Newspapers, Inc., Miami, Fla., a corporation of Ohio Application August 6, 1956, Serial No. 602,364 9 Claims. (Cl. 33t-184.5)

This invention relates to printing and, in particular, to stereotyping.

One object of this invention is to provide a machine for pre-registering stereotype color printing mats to enable their borders to be cut or trimmed accurately so that the metal stereotype plates cast from the paper stereotype mats for the different colors will print accurately in registry with one another and produce sharply defined color illustrations without the blurring caused by lack of precise registry.

Another object is to provide a machine for pre-registering stereotype colo-r printing mats of the foregoing character wherein each mat is held firmly in the machine yet is capable of instant release for adjustment into alignment with precisely located pointed fixation members which are quickly and easily adjusted to their proper positions with a high degree of precision.

Another object is to provide a machine for pre-registering stereotype color printing mats of the foregoing character wherein each mat is held fiat in the machine by a vacuum-operated device and its borders releasably clamped in the adjusted position of the mat by clamping bars which also optionally serve as cutting guides for cutting or trimming the borders of the mat after the mat has been properly located relatively to the fixation members.

Another object is to provide a machine for pre-registerjing stereotype color printing mats of the foregoing char- ;acter wherein the -fixation members are provided with .coarse and fine adiustments whereby they can be movedy into registry not only with standard location ror registry marks similarly positioned on each mat but also op- Another object is to provide a machine for pre-registering stereotype color printing mats of the foregoing charz acter wherein the fixation members when adjusted to the registry marks on the first-color mat, will instantly detect .any deformation of the second, thirdor fourth-color :mat occurring, for example, by stretching or shrinking of the paper of which the mat is made.

Other objects and advantages of the invention will become apparent during the course of the following description of the accompanying drawings, wherein:

Figure l is a top plan View of a machine for pre- :registering stereotype color printing mats, according to one form of the invention, with a stereotype mat or matrix in position but with one corner thereof broken away to disclose the construction of the machine beneath the mat;

Figure 2 Figure l;

Figure 3 is a right-hand side elevation of the machine shown in Figure l;

Figure 4 is a vertical section through the machine of Figure l, taken along the line 4 4 therein;

Figure 5 is a vertical section in a plane at right angles ,to that of Figure 4, taken along the line 5--5 in Figure 2;

is a front elevation of the machine shown in i' tent Figure 6 is a diagrammatic top plan view of a stereotype color printing mat or matrix for a red color plate7 showing the registry marks and, in dotted lines, the border trimming line established in the machine of Figure l;

Figure 7 is a view similar to Figure 6, but showing in heavy solid lines the stereotype color printing mat or matrix for a green color plate, together with its border trimming line, with the portions of the red mat or matrix aligned therewith indicated in dotted vertical lines; and

Figure 8 is a view similar to Figures 6 and 7, but showing in heavy solid lines the stereotype color printing mat or matrix for a blue color plate, together with its border trimming line, with the portions of the red and green mats aligned therewith indicated by dotted vertical and diagonal lines respectively.

Hitherto, in the process of printing known as stereotyping, a paper mat or matrix of a special composition is pressed into heavy contact with the cuts and type so as to receive an impression in its surface corresponding to the configuration of the type and cuts. The mat is then placed in a casting machine, molten metal poured against it and a stereotype printing plate is thereby produced. Such stereotype plates are widely used in newspaper printing, and the stereotype mats have the advantage of transferring the impressions from the type and cuts in one plane to a cylindrical cast metal printing plate having a curved printing surface, such as are used in Imodern high-speed rotary newspaper printing presses.

The stereotype process is also used in color printing, particularly in newspaper printing in which case a mat or matrix is produced in the above described manner from a cut for each color to be printed, and a cast metal printing plate is similarly produced for each color to be printed, from the mat or matrix for that particular color. If the corresponding points of the metal stereotype printing plates do not print exactly in alignment or (registry with one another, the resulting color illustration is fuzzy or indistinct, and is constantly undesirable. In order to produce precise registry of the stereotype printing plates in the printing press, it is necessary to cast them from their several matrixes with their corresponding points located precisely with reference to some reference portion of each matrix, which by custom in the printing industry is the right-hand border side of the matrix. To achieve this result, therefore, it is necessary to cut or trim the border of each matrix in the set of color matrixes in precisely the same position in relationship to corresponding points which recur on all matrixes of the set for the several colors to be printed.

T-he machine of the present invention provides means whereby the first color mat of the set of color mats is firmly but releasably held while certain fixation members are adjusted so as to bring them into coincidence with certain registry marks or points on the mat. These registry marks may be standard marks impressed upon the matrix or they may be naturally occurring points present in each matrix of each color to be printed. After the first color matrix has been so aligned in the machine, the latter provides means whereby its border may be accurately eut, whereupon it is replaced by the second color mat, the registry marks of which are brought into alignment with the fixation members, the mat clamped in position and its border likewise cut. The procedure is repeated in a similar way with the mat or matrix for each mat is located with reference to its registry marks in a manner identical for all mats and enabling them to be interchanged in the casting machine yet producing cast metal printing plates which will be in exact registry When used in the printing press.

Referring to the drawings in detail, Figures 1 to 5 in- Vaaoofzzns clusive show a stereotype color mat pre-registering machine, generally designated 10, according to one form of the invention, as consisting of an open rectangular frame or sustaining structure, generally designated 12, equipped with a mat clamping device, generally designated 14, a mat registry mark xation device, generally designated 16, and a mat holddown or flattening device, generally designated 18, for maintaining the mat 20 in an accurately flat position against a bed or top plate 22 which' is mounted on the top of the frame 12. The frame 12 consists of four legs or uprights 24 of angle members interconnected by similar lower and upper cross members 26 and 28 respectively arranged in a rectangular position.

Mounted on the front and rear upper cross members 28 and secured thereto by the bolts 30 are parallel bars 32 (Figures 3 and 5) which support the front and rear horizontal anges 34 of a pair of spaced parallel channel structures 36. Each of the channel structures 36 in addition to the flanges 34 has parallel depending front and rear portions 38 (Figures 2 and 5 )which are drilled to rotatably receive parallel cam shafts 40 provided with longitudinally spaced lifting cams 42.. Pinned or otherwise secured to the rearward end of each shaft 40 is a sprocket wheel 44, these sprocket wheels being drivingly interconnected by a sprocket chain 46 having a flanged slack takeup wheel 48 engaging the upper course thereof. T he wheel 48 is rotatably mounted on an axle 50 mounted at the end of a vertically swinging arm 52, the rearward end of which is pivotally mounted on a pivot pin 54 which is in turn secured to the rearward upper cross member 28. An adjusting screw 56 (Figure 4) threaded through the same cross member 28 and locked in position by a lock nut 58 exerts a downward pressure upon the arm 52 and consequently upon the wheel 48 to take up the slack in the sprocket chain 46, The right-hand cam shaft 40 (Figure 2) carries a hand crank 60 pinned or otherwise drivingly secured thereto, whereas each shaft 40 near its forward end carries a retaining collar 62 (Figure 5).

The mat clamping device 14 includes parallel side bars 64 interconnected at their rearward ends by a rear bar 66 (Figure l) bolted or otherwise secured thereto as at 68 in a tongue-and-groove connection 69 (Figure 5) and collectively form a mat-clamping frame 70. The side bars 64 and rear bar 66 have inner guide edges 65 and 67 respectively. Near their opposite ends, the side bars 64 are drilled as at 71 to receive the threaded reduced diameter upper end portion 72 (Figure 5) of vertical push rods 74 held in position by nuts 76 threaded upon the threaded portions 72 and having lower end surfaces 78 engageable with the lifting cams 42. The channel structures 36 and the bed plate 22 are also drilled in alignment at 80 and 82 respectively for the guidance and passage of the push rods 74 (Figure 5).

The bed plate or top plate 22 in its central area is provided with multiple air holes 84 (Figure 4) which connect the upper surface 86 thereof with a vacuum chamber 88 formed by a plate 90 bolted as at 92 to the underside of the bed plate 22 through spacing bars 94 to establishV an airtight connection. The plate 9i) is provided with a bored pipe connection boss 96 to which is connected the upper end of a suction pipe 98 leading to the intake port 100 of a conventional vacuum pump 102, the discharge port 104 of which has an air discharge pipe 106 connected thereto. The drive shaft 108 of the vacuum pump 102 carries a pulley 110 which is driven by a belt 112 from the drive pulley 114 on the armature shaft 116 of a conventional, electric motor 118. The motor 118 and vacuum pump 102 are bolted to a platform 120 which in turn is secured to the lower cross members 26 of the frame 12.

The mat registry mark xation device 16 includes four fixation units 122 arranged in two pairs on opposite sides of the machine, each unit 122 being of similar construction. Each pair of units 122 is pivotally mounted upon one of a pair of parallel shafts 124 (Figures 1, 2 and 4), the forward and rearward ends of which are mounted in and pinned to angle brackets 126 bolted or otherwise secured to the under side of the top or bed plate 22. Each fixation unit 122 includes a bracket 130 in the form of an upright bar 131 having a hub 132 bored to pivotally receive the shaft 124 and adapted to be locked thereto by a thumb screw 134. The bracket also has a downwardly-extending integral stop finger 136 (Figure 4) which engages the upper surface 86 of the top or bed plate 22 when the bracket 130 is in a vertical position. The bracket 130 is also provided at its upper end with a transverse bore 138 in which a rod 146 is pinned or otherwise suitably secured. The bracket 130 and rod 140 collectively form a fixation device carrier. Slidably mounted on the rod 140 is a fixation assembly, generally designated `142, having both a coarse adjustment and a fine adjustment. The fixation assembly 142 consists of a main block 144 and an anchor block 146 spaced apart from one another and bored in alignment to slidably receive the rod 140, either or both being capable of being tixedly locked in position by thumb screws 148 and 150 respectively threaded through the tops of the blocks 144 and 146 into engagement with the rod 140.

The block 144 is also bored parallel to the rod 140 to receive one end of a screw rod 152 seated therein and passing through the alignedly bored lower end of the block 146, which has a channel notch 154 therein. Rotatably mounted in the notch 154 and threaded upon the threaded portion of the screw rod 152 is a thumb nut 156, the opposite ends of which abuttingly engage the opposite sides of the notch 154. The lower end of each block 144 is also bored longitudinally to receive the stem 158 of a chuck 160 in which is mounted a pointed fixation needle 162, the sharp tip 164 of which is adapted to register with a registry mark on the mat or matrix, as explained below.

Projecting outwardly from the hub 132 of each bracket 130 of each fixation unit 122 is an integral lug 166 (Figures l and 3) which is drilled parallel to the shaft 124 to receive the end of a screw rod 168 pinned or otherwise secured therein. The opposite end of the screw rod 168 passes through the side walls of a notch 170 in an anchor block 172 and receives a thumb nut 174 which is threaded upon the threaded portion of the screw rod 168. The anchor block 172 is bored to slidably receive the shaft 124, and is also bored and threaded transversely to receive a locking thumb screw 176 (Figure 3). The top or bed plate 22 along its side edges is cut away as at 178 (Figure 1) immediately above the shaft 124 in order to provide clearance for the upright bar 131 of the bracket 130 (Figure 4).

In Figures 6, 7 and 8 are shown three stereotype color printing mats, generally designated 180, 182 and 184 respectively, adapted for use in a three color printing process. The mat or matrix 180 is intended for the casting of a stereotype printing plate for printing the red color, and has depressed portions 186, indicated in vertically hatched lines, adapted to be reproduced in red. The matrix 180 also has embossed registry marks 188 disposed in any convenient locations, such as near its four corners. The green color stereotype matrix 182, on the other hand, has depressed portions outlined in heavy solid lines adapted to be reproduced in green and obliquely cross-hatched. The red squares 186 of the red color matrix 1-80 are also shown in Figure 7 in dotted lines merely to show their relative positions which they occupy during alignment and registry in the machine 10 of the present invention. The matrix or mat 182 (Figure 7) also has embossed registry marks 192 corresponding in location precisely to the registry marks 188 so as to be accurately alignable therewith. The matrix 184 (Figure zontal parallel solid lines. These depressed areas 194 are intended to produce raised areas on the printing plate cast therefrom for printing the blue color areas in the newspaper or other work. Figure 8 also shows in dotted lines the vertically hatched squares 186 intended to be reproduced in red and the obliquely hatched squares 190 intended to be reproduced in green, so as to show their relative locations in the finished work as well as their relative positions when successively placed in the machine 10 for pre-registry as described below in connection with the operation of the invention. The mat or matrix 184, like the mat or matrix 180 and the mat or matrix 182 has embossed registry marks 196 thereon corresponding precisely in location to the registry marks 188 and 192 respectively.

In the operation of the invention, let it be assumed that the red color matrix 180, the green color matrix 182 and the blue color matrix 184 have been separately produced by the conventional method described briefly above, and that their respective depressed areas 186, 190 and 194 have been formed by the pressing of the matrix paper against the cut or type which is to be stereotyped. To mount the red stereotype matrix 180 in the machine 10, the operator rotates the hand crank 60 to correspondingly rotate the cam shafts 40 and their cams 42, raising the push rods '74 and the clamping frame 70 connected thereto away from the upper surface 86 of the top or bed plate 22. The operator also swings the four fixation units 122 of the fixation device 16 upwardly away from the bed plate 22 into the dotted line positions corresponding to that shown in the upper left-hand corner of Figure 4.

The operator now inserts the matrix 180 beneath the now raised clamping frame 70 until its border lies beneath the bars 64 and 66 thereof in an approximately centered location. The operator then starts the motor 180 so as to operate the vacuum pump 102 and evacuate the chamber 88 (Figure 4), the consequent suction exerted through the holes 84 in the top or bed plate 22 pulling the matrix 188 lirmly and flatly downward against the upper surface 86 of the plate 22. The operator then rotates the hand crank 68 in a reverse direction so as to lower the push rods 74 and the clamping frame 70 carried thereby into clamping engagement with the approximately centered red color matrix 180. The weight of the clamping frame 70 and push rods 74 clamps the matrix 188 fixedly in position.

The operator now swings the fixation units 122 forward from their raised positions into their lowered positions, as indicated by the solid lines in Figures 2 and 4, and having loosened the thrumb screws 148, 150, 134 and 176, slides each bracket 130 back and forth along its respective shaft 124 and slides the fixation assembly 142 thereof back and forth along its respective rod 140 until the pointed tip 164 of its fixation needle 162 is approximately in registry with the nearest registry mark 188 on the matrix 186. The operator then tightens the thumb screws 176 and 150 so as to lock the blocks 172 and 146 iixedly in position. The operator now lifts the outer end of the rod 148 slightly upward to lift the point 164 of the fixation needle 162 ofi the registry mark 188 while he adjusts the thumb nuts 174 and 156 relatively to their respective screw rods 168 and 152 so as to move the bracket 130 precisely back and forth by a iine adjustment and also to move the block 144 to and fro with a flne adjustment until the point 164 of the fixation needle 162 rests exactly in the center of the registry mark 188. The operator then tightens the thumb screws 134 and 148 to lock the bracket 138 and the block 144 in their adjusted positions, consequently locking the point 164 of the fixation needle 162 in registry with the center of the registry mark 188.

The operator repeats the foregoing adjustment and registry of the fixation needle 162 with each of the fixation units 122 in turn, until the point 164 of each fixation needle 162 thereof is likewise accurately in registry with the centerof its respective registry mark 188. The operator then carefully swings the fixation units 122 upward into their inactive positions corresponding to the dotted line position in the upper left-hand corner of Figure 4 and runs the end or edge of a knife or scriber 198 (Figure 4) along the guide edges 65 and 67 of the cutting frame 70 to scribe a cutting line 202 thereon (Figure 6). The operator then halts the motor 118 and vacuum pump 102, breaks the vacuum in the vacuum chamber 88, as by opening an air valve (not shown) admitting air thereto. He then rotates the crank 60 in a forward direction to raise the clamping frame 70, removes the matrix and trims the border thereof along the cutting line 202, in a conventional trimming machine. I

The operator now inserts the green color stereotype mat or matrix 182 in the machine 10lii1 the same manner as described above in connection with the insertion of the red color mat 180 and approximately centers it in the space inside the clamping frame 70. He then lowers one of the fixation units 122, moving the matrix 182 until the point 164 of the respective fixation needle 162 registers exactly with the center of the registry mark 192. Leaving the point 164 in contact with its respective registry mark 192, he then swings the matrix 182 slightly around the point`164 as a pivot, at the same time lowering another of the fixation units 122 into contact with another of the registry marks 192 untilv its point 164 also registers with the center of its respective registry mark 192.

With the mat- 182 thus registered with two of the points 164 of the fixation needles 162, the operator restarts the motor 118 to produce a matrix holddown vacuum in the chamber 88- and ports 84, thereby flattening out the matrix 182. If the registry marks 192 do notv remain in registry with the points 164, the operator repeats the foregoing adjustment. If the two remaining fixation needles 162 of the two remaining fixation units V122', when lowered, do not exactly register with their re-` spective registry marks 192, the indicationv is that the matrix 182 has' become slightly stretched or shrunk in comparison with the matrix 180, whereupon compensation must be made in order to bring the areas 19t) of the matrix 182 into their proper relationship for cutting.

When the matrix 182 has thus been properly registered with the points 164 previously registered with the registry marks 188 of the matrix 180, the operator lowers the clamping frame 70'by rotating the' crank 6i) in the manner described above, and then uses the guide edges 65 and 67 to scribe a cutting line 282 on the matrix 182. In the manner described above, he then removes the matrix 182 from the machine 10 and trims the border thereof along the scribed line 202.

The operator now inserts the blue color matrix 184 in the machine 10, adjusts-its registry marks 196 into coincidence with the points 164 of the lowered fixationneedles 162 as before, liattens it out by applying a vacuum tothe chamber 88, clamps the thus-registered matrix 184y in its registered position and as before scribes a cutting. line 202 around three sides of the border thereof. In. the manner described above, he then unclamps the blue color matrix 184, breaks the vacuum thereunder, removes the matrix 184 from the machine 10 and trims the border thereof in a conventional trimming machine along the scribed cutting line 202.

another Without blurring or misalignment.

What I claim `is:

1. A machine for pre-registering a set of sterotype color mats according to a plurality of registry marks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining structure, a mat clamping member mounted on one of said structures and movable into and out of clamping engagement with said bed structure, a guideway mounted on one of said structures, said mat clamping member being movable relatively to and independently of said lastmentioned structure a plurality of fixation device carriers movably mounted on said guideway for travel back and forth therealong, and a fixation device movably mounted on each carrier for adjustment to and fro relatively to said bed structure into registry with one of the registry marks.

2. A machine for pre-registering a set of stereotype color mats according to a plurality of registry marks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining structure, a mat clamping member mounted on one of said structures and movable into and out of clamping engagement with said 'bed structure, a guideway mounted on one of said structures, said mat clamping member being movable relatively to and independently of said last-mentioned structure a plurality of fixation device carriers movably mounted on said guideway for travel back and forth therealong, and a fixation device movably mounted on each carrier for adjustment to and fro relatively to said bed structure into registry with one of the registry marks; each fixation device including a fixation element holder, a xation element secured to and projecting from said holder toward said bed structure, and means for releasably locking said holder to said carrier.

3. A machine for pre-registering a set of stereotype color mats according to a plurality of registrymarks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining structure, a mat clamping member mounted on one of said structures and movable into and out of clamping engagement with said bed structure, fixation device supporting means swingably mounted on one of said structures for swinging motion relatively to and independently of said mat clamping member, and a plurality of fixation devices movably mounted on said supporting means for adjustment to and fro relatively to said -bed structure into registry with a plurality of the registry marks.

4. A machine for pre-registering a set of stereotype color mats according to a plurality of registry marks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining structure,`

a mat clamping member mounted on one of said structures and movable into and out of clamping engagement with said bed structure, fixation device supporting means swingably mounted on one of said structures for swinging motion relatively to and independently of said mat clamping member, and a plurality of fixation devices movably mounted on said supporting means for adjustment to and fro relatively to said bed structure into registry with a plurality of the registry marks; each fixation device including a fixation element holder, a fixation element secured to and projecting from said holder toward said bed structure, and means for releasably locking said holder to 'said supporting means.

5. A machine for pre-registering a set of stereotype color mats according to a plurality of registry marks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining structure, a mat clamping member mounted on one of said structures and movable into and out of clamping engagement with said bed structure, fixation device supporting means swingably mounted on one of said structures for `swinging motion relatively to and independently of said mat clamping member, and a plurality of fixation devlces movably mounted on said supporting means for adjustment to and fro relatively to said bed structure into registry with a plurality of the registry marks; each fixation device including a fixation element holder, a fixation element secured to and projecting from said holder toward said bed structure, an anchor member releasably lockable to said supporting means, and a fine adjustment mechanism connecting said fixation element holder to said anchor member.

6. A machine for pre-registering a set of stereotype color mats according to a plurality of registry marks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining structure, a mat clamping member mounted on one of said structures and movable into and out of clamping engagement with said bed structure, fixation device supporting means mounted on one of said structures, and a plurality of fixation devices movably mounted on said supporting means for adjustment to and fro relatively to said bed structure into registry with a plurality of the registry marks, said clamping member having a rectilinear scriber guiding edge therealong.

7. A machine for pre-registering a set of stereotype color mats according to a plurality of registry marks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining structure, a mat clamping member mounted on one of said structures, cam mechanism operatively engageable with said clamping member for moving said clamping member into and out of clamping engagement with said bed structure, fixation device supporting means mounted on one of said structures, and a plurality of fixation devices movably mounted on said supporting means for adjustment to and fro relatively to said bed structure into registry with a plurality of the registry marks.

8. A machine for pre-registering a set of stereotype color mats according to a plurality of registry marks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining struct-1re, a mat clamping member mounted on one of said structures, cam mechanism including motion transmitting members operatively engageable with said clamping member for moving said clamping member into and out of clamping engagement with said bed structure, fixation device supporting means mounted on one of said struetures, and a plurality of xation devices movably mounted on said supporting means for adjustment to and fro relatively to said bed structure into registry with a plurality of the registry marks.

9. A machine for pre-registering a set of stereotype color mats according to a plurality of registry marks on each mat in corresponding locations in the set, said machine comprising a sustaining structure, a mat receiving bed structure mounted on said sustaining structure, a mat clamping member mounted on one of said structures, cam mechanism operatively engageable with said clamping member for moving said clamping member into and out of clamping engagement with said bed structure, fixation device supporting means mounted on one of said structures, and a plurality of fixation devices movably mounted on said supporting means for adjustment to and fro relatively to said bed structure into registry with a plurality of the registry marks; said cam mechanism including a plurality of spaced shafts, cams on said shafts, motion transmitting mechanism drivingly interconnecting said shafts, and push rods engageable with said cams and connected to said clamping member.

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